package com.tanhua.sso.service;

import cn.hutool.core.util.ObjectUtil;
import com.alibaba.dubbo.config.annotation.Reference;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.tanhua.common.mapper.UserMapper;
import com.tanhua.common.pojo.User;
import com.tanhua.dubbo.server.api.HuanXinApi;
import io.jsonwebtoken.ExpiredJwtException;
import io.jsonwebtoken.JwsHeader;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.messaging.MessagingException;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserService {
    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Autowired
    private UserMapper userMapper;

    @Reference(version = "1.0.0")
    private HuanXinApi huanXinApi;

    @Value("${jwt.secret}")
    private String secret;

    @Autowired
    private RocketMQTemplate rocketMQTemplate;


    public String login(String phone, String code) {
        boolean isNew = false;
        String redisKey = "CHECK_CODE_" + phone;
        String s = redisTemplate.opsForValue().get(redisKey);
        if(!StringUtils.equals(code,s)){
            //验证码错误
            return null;
        }
        //删除验证码
        redisTemplate.delete(redisKey);
        //查询是否是新用户
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("mobile",phone);
        User user = userMapper.selectOne(queryWrapper);
        if(user == null){
            //是新用户需要注册
            isNew = true;
            user = new User();
            user.setMobile(phone);
            user.setPassword(DigestUtils.md5Hex("123456"));
            userMapper.insert(user);
            //注册到环信平台
            Boolean result = this.huanXinApi.register(user.getId());
            if (!result) {
                //注册环信失败，记录日志
                log.error("注册环信用户失败~ userId = " + user.getId());
            }
        }
        Map<String, Object> header = new HashMap<String, Object>();
        header.put(JwsHeader.TYPE, JwsHeader.JWT_TYPE);
        header.put(JwsHeader.ALGORITHM, "HS256");
        Map<String, Object> claims = new HashMap<String, Object>();
        claims.put("mobile", phone);
        claims.put("id", user.getId());
        // 生成token
        String jwt = Jwts.builder()
                .setHeader(header)  //header，可省略
                .setClaims(claims) //payload，存放数据的位置，不能放置敏感数据，如：密码等
                .signWith(SignatureAlgorithm.HS256, secret) //设置加密方法和加密盐
                .setExpiration(new DateTime().plusHours(12).toDate()) //设置过期时间，3秒后过期
                .compact();
        try {
            //发送用户登录成功的消息
            Map<String,Object> msg = new HashMap<>();
            msg.put("id", user.getId());
            msg.put("date", System.currentTimeMillis());

            this.rocketMQTemplate.convertAndSend("tanhua-sso-login", msg);
        } catch (MessagingException e) {
            log.error("发送消息失败！", e);
        }
        return jwt + "|" + isNew;
    }

    public User queryUserByToken(String token) {
        try {
            // 通过token解析数据
            Map<String, Object> body = Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
           //{mobile=1333333333, id=2, exp=1605513392}
            User user = new User();
            user.setId(Long.valueOf(body.get("id").toString()));
            user.setMobile(body.get("mobile").toString());
            //需要返回user对象中的mobile，需要查询数据库获取到mobile数据
            //如果每次都查询数据库，必然会导致性能问题，需要对用户的手机号进行缓存操作
            //数据缓存时，需要设置过期时间，过期时间要与token的时间一致
            //如果用户修改了手机号，需要同步修改redis中的数据
//            String redisKey = "TANHUA_USER_MOBILE_" + user.getId();
//            if(redisTemplate.hasKey(redisKey)){
//                String mobile = this.redisTemplate.opsForValue().get(redisKey);
//                user.setMobile(mobile);
//            }else {
////                //查询数据库
////                User u = this.userMapper.selectById(user.getId());
//                user.setMobile(body.get("mobile").toString());
//                //将手机号写入到redis中
//                //在jwt中的过期时间的单位为：秒
//                long timeout = Long.valueOf(body.get("exp").toString()) * 1000 - System.currentTimeMillis();
//                this.redisTemplate.opsForValue().set(redisKey,body.get("mobile").toString(), timeout, TimeUnit.MILLISECONDS);
//            }
            return user;
        } catch (ExpiredJwtException e) {
            log.info("token已经过期！token = " + token);
        } catch (Exception e) {
            log.error("token不合法! token =" + token,e);
        }
        return null;
    }
    public Boolean updatePhone(Long userId, String newPhone) {
        //先查询新手机号是否已经注册，如果已经注册，就不能修改
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("mobile", newPhone);
        User user = this.userMapper.selectOne(queryWrapper);
        if(ObjectUtil.isNotEmpty(user)){
            //新手机号已经被注册
            return false;
        }

        user = new User();
        user.setId(userId);
        user.setMobile(newPhone);

        return this.userMapper.updateById(user) > 0;
    }
}
